Home / 20,954.75-31,450.95-18,730.08

Finding the Fourth Proportional to 20,954.75, 31,450.95 and 18,730.08

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Solution

The fourth proportional to 20,954.75, 31,450.95 and 18,730.08 is: 28,111.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.75 : 31,450.95 = 18,730.08 : x
  2. Step 2: Convert to fraction form
    20,954.75/31,450.95 = 18,730.08/x
  3. Step 3: Cross multiply
    20,954.75x = 31,450.95 × 18,730.08
  4. Step 4: Simplify right side
    20,954.75x = 589,078,809.58
  5. Step 5: Solve for x
    x = 589,078,809.58/20,954.75
  6. Step 6: Final answer
    x = 28,111.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.